Seam for woven-wire belts



`une 1 1926.

H. LINDSAY sEAM FOR WOVEN WIRE .BELTS Filed May 12, 1924 Patented .lune1, 1926.

' Unire stares ATE FFICE.

HAMILTON LINDSAY, OF CLEVELAND, OHO, ASSEGNOR lO THE LNDSAY WRE VEAV-ING COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

SEAM FOR WOVEN-WIRE BELTS.

Application led May 12, 1.924. Serial No. 712,579.

T his invention relates to means tor` joining the ends olf a wire fabricto iorm an endless belt which is particularly usetul on Fourdrinierpaper machines. My invention is also adapted tor use in connection witha belt having` a special weave as set forth in my copendinzgapplicationSerial No. 525,403, tiled December 28, 199.Y

Briefly the belt illustrated in my copending` application embodies afabric wherein the` lower knuckles ot the longitudinally e1;- tendinglor warp wires pass continuously beneath two or more cross` or woot wiresinstead of only one. Accordingly the warp wires are divided into twogroups, each preterably ot three wires in number during the weavingoperation, and are so manipulated that one group 'forms one plane otlthe shed while the other two groups torni the other plane ot the shed,while the shuttle passes therebetween and across the loom. These groupsare intel-changed at each stroke of the shuttle, whereby the fabric sotermed has short knuckles on the upper side thereo't and long knuckleson the lower side thereot. This results in a construction which whentermed intoa belt gives a longer wearingl surface to. the under side ofthe belt, thereby increasing the lite thereof.

One of the diiiiculties in joining the ends ot a. belt is the provisionot' a seain having su'l'l'ieient strength to` e'llect a strong oint yetwhich does not h-lly the interstices (which would render it diii'icultfor water to pass through the seam when the belt is in use), and at thesaine time forms a su'liicient sup-A port between the ends ol? thefabric so as not to strain the pulp.

Seams for Joining the ends ot' woven wire belts have heretofore beenmade, but usually suoli seams require the use ot' a closing wirey inaddition to stitchingl wires which are intended to reinforce the end ofthe belt so as to prevent movement of the woot wirres when the belt isinl use.

Accordingly one ofthe objects of: my invent-ion is the provision of aseam having suilicient space tor the passage ot water therethrough andsufficient support between the ends otr the fabric so that the pulp isproperly drained and at the same time supportedadjacent the seam,whereby the paper is not weakened. Furthermore my invention includes aseam, the wires of which lie in substantially the saine plane as thewarp wires, so that the wear occasioned by the passage ot the seamacross a suction box is not greater than that occurring on other partsof the belt.

Another object of my invention is the provision ot a seam whicheliminates the necessity or a closing` wire independently ot stitchinglwires, wherefore l eliminate one complete operation in the joiningoit' abelt. rllhis is aovantageous, particularly since the width ci a belt isusually l2 to l5 feet while the ia-brie is about sixityinesh, and sincethe sewing must be accomplished by hand.

The preferred embodiment for carrying` out my invention is illustratedin connection with the accompanying drawings and is herenater describedin detail. rllhe essential :lfeatures and characteristics are sumnianized in the claims.

ln the drawings, Figs. l and 2 are plan Views illustratingportionsadjacent the ends of a belt having a weave constructed as heretot'ore cescribed and illustrating a seani enibodying` my invention, wherein Fig.l shows the top side of the belt, while Fig. 2 shows the bottomside'thereof; and Fig. 3 is a seetion tal-ien on the line 3 B in Fig. l.

My invention is well adapted for use in joining` the ends olf a belteniibodyine,` any standard weave, but l hare illustrated itin connectionwith the special weave describeal and claimed in my copendingapplication. Accordingly by r-r-rterring to the drawings the fabric isshown as having,l warp wires n.1, n.2, A3, etc., which are interworenwith woot' wires at one eind ot the belt as indicated at B1, 52, B3,etc. The woot` wires at the cooperating' end ot' the belt are indicatedat BB1, Blf, BB, etc. 'lhe manner in which the weave is made isillustrated by the upper end ot the belt in Fig. l wherein the warp wireA1 passes over the woot' wire B1, then beneath two transverse wires B2and B3, over the wire B4, and then beneath the next two transverse wiresof which only one is shown. The next warp wire indicated at A2 passesbeneath two wool? wires B1 and B2, then over the wire B3, thence beneaththe next two woot wires B4, B5, ete. rlhe third warp wire A3 passesbeneath the woot wire Bl, then over thel wool wire B2, thence beneaththe next two wires B3 and B4, then over the wire B, etc. The woot wiresBB1 to BB5 respectively illustrated in the lower lr lit ot Fig. l areinterwoven with the warp wires in the saine mann as illus ated tor theupper ln c she-vn in Fig. l.

the .vn and described has warp wires which ass alternately over one wootwire and beneath two succeeding woot wir while the woot wires passalternately offer two and beneath one warp wire. This provid a beltharing on its under side a series or long longitudinal or warp knucklesin contrsulis inction to the short or abrupt knuckles on the upper side.This provides a wer-,re wherein every third warp wire adjacent the sainewoot wire has a short knuckle on the upper side as is shown particularlyin Fig. l, wherein the wire B4 has short knuckles on the top sidethereof indicated at l0 to 14 respectively. Similarly the wire B3 on thetop side of the fabric has short knuckles, each positioned one warp wireto the lett o1 those forming the short knuckles over the wire B* asindicated at 16 to 2O respectively. The corresponding short knuckles onthe lower region of the belt are indicated on the woot wire BB 1 at 2lto 25, and on the wire BB3 at 26 to 30 respectively.

The sean-i embodying iny invention is illustrated as comprising astitching wire S which extends around one end of the fabric to forniloops adjacent the end of the belt. This stitching` wire is carried intothe belt a suliicient distance to prevent unraveling when tension isplaced thereon during use, and as shown has inner loops all of whichpass over the saine woot wire B134. rlhe tendency ot the stitching wireto displace the woot wire BB1 is resisted by the rise of the wire A2which forms the short knuckle 26 and by the tall of the wire A3 whichorins the short knuckle 2l. 1n this way, the woot Wire is not distortedwhen tension is placed upon the belt. The outer loops of the wire S areshown as passing over the woot' wire BBl and in such position as toavoid the short knuckles on the top and bottoni sides ot the fabric,wherefore the seam-forming wire lies in substantially the saine plane asthe warp wires. This has a tendency to increase the lite ot the belt byreducing the friction occasioned by the tr vel of the belt over thesuction boxes in a paper machine.

rlhe upper half ol the belt indicated in Fig. 1 has a seein-forming wireS1 which passes through the belt over the woot wire B4 between warpwires, one ot which has the rise ot a short knuckle on one side thereofand the "fall of a short knuckle on the other side thereof. Forinstance, the loop passing between the warp wires A1 and A2 has the talloi the short knuckle l0 on one side and the rise or the short knucklelll on the other side thereof. ln this way the seani torining wire S1has inner loops all ol which pass over the. saine woot wire Bl.

rlhe outer loops ot the wire S1, however, extend across the end ot thebelt and are passed around the woot wire BB1, and through the outerloops on the wire Pi. Vlliis provides a seain whe ein the wire S1 servesas a closing wire, as well as a stitchine' or reinforcing wire.

in advantage ot a seain inade in accordance with iny invention is thatone end ol: the belt inay be placed over the other aller the wire S ispreviously woven into the tabric, whereupon the wire S1 inay besiinultaieously interwoven through the end ol: the belt on which itserves as a reinforcing wire and also through the outer loops ot thecooperating stitching wire. 'lhis elirninates the necessity tor a thirdsewine' operation, which is a inaterial advantage since the belts areusually inade of wire having; sixty niesh, wherefore eachseain-'lorininig wire has about twenty loops within the belt to theinch. rlhe ditiiculty of making such a seain by hand is readilyapparent.

i sea-in inade in accordance with the iresent inrention does not clogthe space across the ends of the belt sutiiciently to interfere with thedrainage, and at the saine tiine, does not provide too great a space soas to strain the pulp.

Having thus described iny invention, l claim l. A senin for woven wirefabric coinprising two seam-forming wires, each oiV said wires extendingack into the belt over a plurality of woot wires and each havinI innerloops and outer loops7 the outer loops of one wire passing through theouter loops oi the other wire.

2. A. seain tor woven wire fabric coinprising a stitch-forming wire ateach end of the belt, having inner loops and outer loops, and extending`back into the belt over a plurality @t wool wires, the loops ot onestitching|` wire passing through the loops in the other stitching wire,and the loops both wires passing around the` saine wool wire.

3. A seani for woven wire fabric comprising two seam-forming wires, eachhaving inner loops and outer loops and each extending back into the beltover a plurality of woot' wires, soine ot the outer loops ot one wireextending,` across the searn opening and passing through the outer loopsin the other wire.

ll. A seani for woven wire fabric comprising two seein-forming wires,each having inner loops and outer loops and each extending back into thebelt over a plurality ot wool wires, soine of the outer loops of onewire passing` around the end woot Wire, and

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soine of the outer loops of the other seamforining wire passing acrossthe seam opening and extending through the outer loops on thefirst-mentioned seam wire, and also extending around said end woof wire.

5. A seam for woven wire fabric comprising two sean'i-forining wires,each having inner loops and outer loops, and each extending back intothe belt over a plurality of Woof wires, the outer loopsof each wirebeing looped around the saine Woof wire.

6. A seam for Woven wire fabric comprising two seam-forming wires, eachhaving inner loops and outer loops and each extending uback into thebelt over a plurality of Woof wires, the outer loops of each wire beinginterlocked around the same Woof Wire, whereby one sea1n-for1ning wireterminates at the end of the belt, While the other extends across theseam opening.

7. A seam for Woven wire fabric compris` ing two seam-forming Wires,each having inner loops and outer loops and each extending back into thebelt over a pluralityT of Woof wires, the outer loops being interlocked,the inner loops of one wire passing through the fabric over the saineWoof Wire on. one end of the belt, and the` inner loops of the otherWire passing over the salne woof wire on the opposite end of the belt.

8. A seam for an endless belt wherein the Weave comprises warp wires andwoof wires, the warp wires having long knuckles on one side of the beltand short knuckles on the other side thereof, having two seam-formingwires, each lia-ving inner loops and outer loops and each extending`back into the belt over a plurality of woof wires, the outer loops beinginterlocked and the inner loops of at least one of the wires passingthrough the belt adjacent a short warp knuckle.

9. A seam for an endless belt wherein the weave comprises warp wires andWoof wires, the warp wires having long knuckles on one side of the beltand short knuckles on the other side thereof, comprising twoseamforining wires, each having inner loops and outer loops and eachextending back into the belt over a plurality of Woof wires, vthe outerloops being interlocked 'over an end woof wire, and the inner loopspassing through the beltl between two Warp wires, one of which has therise of a short Warp knuckle, and the other of which has the fall of ashort warp knuckle adjacent to the loops.

l0. A seam for an endless belt wherein the weave comprises warp wiresand Woof wires, the Warp wires having long knuckles on one side of thebelt and short knuckles on the other side thereof, comprising twoseamforining wires, each having inner loops and outer' loops and eachextending back into the belt over a plurality of Woof wires, each innerloop passing through the belt in such manner that the Woof wire overwhich the inner loops extend is disposed intermediate the rise of ashort warp knuckle and the fall of another short warp knuckle, While allof the inner loops of one seam-forming wire pass over the saine Woofwire on one end of the belt, and the inner loops of the otherseam-forming Wire pass over the saine Woof wire on the opposite end ofthe belt.

In testimony whereof, I hereunto aiiix my signature.

HAMILTON LINDSAY.

